The Signature of All Things recap

Born in 1800 to a wealthy botanical trader and his formidable Dutch wife, Alma Whittaker grows into a brilliant but isolated botanist. Her adopted sister Prudence marries the man Alma first loves, while Alma builds a serious study of mosses. She later marries the mystical orchid artist Ambrose Pike, but their marriage is never consummated; after she sends him to manage the family's affairs in Tahiti, he dies there. Following her parents' deaths, Alma travels to Tahiti and learns from people who knew Ambrose that his inner and sexual life was unlike the one she imagined. An arduous encounter with the island's landscape gives her a new sense of life's relentless adaptation. She continues to Amsterdam, becomes a moss curator, and independently reasons toward natural selection, but does not publish because human altruism seems to contradict her model. Darwin and Wallace publish the idea instead. In old age she recognizes Prudence's abolitionism as the answer she had missed and meets Wallace, ending her life as an accomplished scientist at peace with having contributed without receiving the greatest discovery's credit.

Henry Whittaker rises from a poor childhood near Kew Gardens by turning botanical knowledge into commercial advantage. Voyages and the medicinal plant trade make him wealthy, and he establishes the grand White Acre estate outside Philadelphia. He marries the rigorously educated Dutchwoman Beatrix van Devender. Their daughter Alma, born in 1800, is raised amid specimens, scholars, exacting lessons, and her father's appetite for argument. She becomes intellectually formidable and intensely observant, though conscious that she does not possess the beauty or ease society rewards in women. White Acre gives her unusual freedom to study, but it also forms a protected world governed by two powerful parents and by the assumption that every question can be mastered through discipline.

The Whittakers adopt the beautiful, quiet Prudence, who becomes Alma's sister and opposite. Retta Snow joins them as an imaginative friend, widening the girls' emotional world beyond the severe routines of White Acre. As they mature, Alma turns her attention increasingly to botany and begins the patient study of mosses that will define her scholarship. She forms an intellectual attachment to the botanist and publisher George Hawkes and hopes he may see her as both colleague and woman. Instead, George and Prudence love one another and marry. Alma experiences the loss as a profound personal rejection, made more difficult by Prudence's reserve and by Alma's inability to disclose the full force of her own desire. She remains at White Acre and transfers frustrated feeling into close scientific work.

Alma's adult life narrows around care for her ageing parents, correspondence with other botanists, and the miniature landscapes of moss. Retta's life also fails to become the romantic escape she once imagined, leaving another reminder that affection does not guarantee happiness. Ambrose Pike arrives with exquisite paintings of orchids and a conviction that nature carries signs of divine unity. Alma distrusts his mysticism but is moved by the precision of his vision and by his apparent ability to see her fully. Their intimacy develops through long discussions that join scientific and spiritual attention. Alma proposes marriage, and Ambrose accepts. She enters the union expecting at last to unite bodily love with intellectual companionship, although neither has adequately understood what the other expects marriage to mean.

Alma and Ambrose's marriage is never consummated. Ambrose recoils from sexual contact and interprets their bond through a spiritual ideal that leaves Alma humiliated and bewildered. Her efforts to understand him reveal private images and desires that make clear how little his inward life resembles the marriage she imagined. Unable to endure their suspended household, Alma sends him to Tahiti, where the Whittaker interests include a vanilla enterprise he can oversee. Ambrose remains there and eventually dies. After Henry and Beatrix also die, Alma is left with White Acre, her scientific work, and unresolved questions about her husband. Rather than keep interpreting Ambrose from a distance, she relinquishes the settled life her inheritance could secure and decides to travel to Tahiti herself.

In Tahiti, Alma stays with Reverend Welles and searches for an honest account of Ambrose's years on the island. The landscape, missionary society, and local knowledge repeatedly resist the categories she brought from Philadelphia. Tomorrow Morning, a Tahitian man close to Ambrose, forces her to confront dimensions of Ambrose's emotional and sexual life that he concealed from her. Alma understands that his solitude and death cannot be reduced to the simple story of an abandoned husband. She undertakes an arduous journey into the island's interior, where danger, exhaustion, and the abundance of competing life transform her long observations into a wider insight: living forms persist by variation, struggle, and adaptation over immense time. She survives and leaves Tahiti altered, choosing not to return to White Acre but to continue onward toward her mother's Dutch family.

Alma reaches Amsterdam and is received by her uncle Dees van Devender. Her expertise earns her lasting work as a curator and scholar of mosses, allowing her to build an independent scientific life far from White Acre. She develops a theory of species changing through the selection of advantageous variations, but cannot resolve the place of human self-sacrifice within a model driven by survival. She therefore does not publish the general theory. Darwin and Wallace later present natural selection to the world. Information about Prudence's sustained abolitionist work helps Alma understand that cooperation and sacrifice need not be dismissed merely because competition is powerful. In old age she meets Wallace and discusses both evolution and his spiritual convictions. Alma remains a materialist and accepts that others reached and published the great idea. The novel leaves her an elderly, respected botanist reconciled to a life of real discovery, even though its central insight bears other names.

Alma settles permanently in Amsterdam and becomes a respected curator and authority on mosses. Her decades of observation lead her to an account of how species alter through competition and selection, but she withholds it because she cannot make apparently self-sacrificing human behaviour fit the system. The later work of Charles Darwin and Alfred Russel Wallace brings natural selection into print without her. Alma eventually understands that Prudence had devoted her life and resources to abolition, giving Alma a concrete example of the altruism that troubled her theory. In old age Alma meets Wallace. She accepts that scientific discovery did not require her authorship and debates his spiritual interests from her own materialist position. The novel closes with Alma elderly, recognized for the work she did publish and reconciled to the larger pattern of knowledge to which her private discoveries belonged; she does not regain Ambrose or establish a family, but neither is her life reduced to those absences.